package com.gxa.p2p.controller;

import com.gxa.p2p.common.JsonResult;
import com.gxa.p2p.pojo.MarkImgs;
import com.gxa.p2p.service.MarkImgService;
import io.swagger.annotations.Api;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.util.Map;
import java.util.UUID;

/**
 * @author R
 * @data 2021-10-21 15:49
 */
@CrossOrigin
@RestController
@RequestMapping("/uploads")
@Api(value = "轮播操作接口")
public class UploadControllerImgs {

    @Autowired
    MarkImgService markImgService;

    @PostMapping("/uploadImage")
    public Map<String, Object> upload(@RequestParam("file") MultipartFile multipartFile, HttpServletRequest request,@RequestParam("mid") Long mid,@RequestParam("state") Integer state) throws IOException {
        //QQ截图20200724153059.png
        String originalFilename = multipartFile.getOriginalFilename();
        System.out.println("originalFilename:"+originalFilename);
        // 从原始文件名中获取后缀,作为新添加的文件的文件名后缀(匹配)
        String subfix = originalFilename.substring(originalFilename.indexOf(".")+1);
        System.out.println("subfix:"+subfix);
        //使用UUID作为文件名,保证服务器中存放的文件名唯一

        String targetFile = UUID.randomUUID().toString().replace("-","")+"."+subfix;
        System.out.println("targetFile:"+targetFile);

        // 通过request获取当前程序的根路径"/"
        String path = request.getSession().getServletContext().getRealPath("/");
        System.out.println("path:"+path);
        String fileName = path+"/images/uploadImg/"+targetFile;
        System.out.println("fileName:"+fileName);

        // 构建文件对象
        File uploadFile = new File(fileName);
        //核心操作(含有异常操作, 利用异常设定状态码(和前端约定)
        // 此处应当和ExceptionController结合, 当try执行成功则设定状态码0
        // 出现异常则设定其他
        // 再将异常信息结合BusinessException抛出, 交给ExceptionController处理
        try {
            multipartFile.transferTo(uploadFile);
        } catch (IOException e) {
            //e.printStackTrace();
            throw e;
        }
        //将图片存入数据库
        MarkImgs markImgs = new MarkImgs(mid,targetFile,state);
        markImgService.add(markImgs);

        JsonResult jsonResult = new JsonResult();

        // 返回状态:0 表示上传成功
        jsonResult.setCode("0");
        // 返回服务器保存后的文件名
        jsonResult.put("fileName",targetFile);
        return jsonResult.getDataMap();

    }
}
